你的示例代码是不是缺少声明
时间: 2023-07-27 12:07:29 浏览: 38
是的,非常抱歉,我漏掉了一些声明。以下是完整的示例代码,包括了类的声明和主函数:
```c++
#include <iostream>
#include <cstring>
#include <stdexcept>
template<typename T>
class CMatrix {
private:
int row;
int col;
T** data;
public:
CMatrix(int r, int c);
CMatrix(const CMatrix<T>& other);
~CMatrix();
CMatrix<T>& operator=(const CMatrix<T>& other);
CMatrix<T> operator*(const CMatrix<T>& other);
CMatrix<T>& operator++();
CMatrix<T>& operator--();
};
template<typename T>
CMatrix<T>::CMatrix(int r, int c) {
row = r;
col = c;
data = new T*[row];
for(int i = 0; i < row; i++) {
data[i] = new T[col];
memset(data[i], 0, col * sizeof(T));
}
}
template<typename T>
CMatrix<T>::CMatrix(const CMatrix<T>& other) {
row = other.row;
col = other.col;
data = new T*[row];
for(int i = 0; i < row; i++) {
data[i] = new T[col];
memcpy(data[i], other.data[i], col * sizeof(T));
}
}
template<typename T>
CMatrix<T>::~CMatrix() {
for(int i = 0; i < row; i++) {
delete[] data[i];
}
delete[] data;
}
template<typename T>
CMatrix<T>& CMatrix<T>::operator=(const CMatrix<T>& other) {
if(this != &other) {
for(int i = 0; i < row; i++) {
delete[] data[i];
}
delete[] data;
row = other.row;
col = other.col;
data = new T*[row];
for(int i = 0; i < row; i++) {
data[i] = new T[col];
memcpy(data[i], other.data[i], col * sizeof(T));
}
}
return *this;
}
template<typename T>
CMatrix<T> CMatrix<T>::operator*(const CMatrix<T>& other) {
if(col != other.row) {
throw std::invalid_argument("The row of the first matrix is not equal to the column of the second matrix.");
}
CMatrix<T> result(row, other.col);
for(int i = 0; i < row; i++) {
for(int j = 0; j < other.col; j++) {
for(int k = 0; k < col; k++) {
result.data[i][j] += data[i][k] * other.data[k][j];
}
}
}
return result;
}
template<typename T>
CMatrix<T>& CMatrix<T>::operator++() {
for(int i = 0; i < row; i++) {
for(int j = 0; j < col; j++) {
data[i][j]++;
}
}
return *this;
}
template<typename T>
CMatrix<T>& CMatrix<T>::operator--() {
for(int i = 0; i < row; i++) {
for(int j = 0; j < col; j++) {
data[i][j]--;
}
}
return *this;
}
int main() {
CMatrix<int> mat1(2, 3);
CMatrix<int> mat2(3, 2);
mat1 = {{1, 2, 3}, {4, 5, 6}};
mat2 = {{1, 2}, {3, 4}, {5, 6}};
CMatrix<int> mat3 = mat1 * mat2;
++mat3;
--mat3;
return 0;
}
```
在这个示例代码中,我们首先包含了必要的头文件。然后,定义了CMatrix类的声明和定义,这个类实现了所有的功能。最后,在主函数中,我们创建了三个矩阵mat1,mat2和mat3,并将它们分别初始化。然后,我们使用操作符*计算mat1和mat2的乘积,并将结果保存在mat3中。最后,我们使用操作符++和--将mat3中的所有元素同时+1和-1。